DC Electronic Load Test Functions in the Automotive Industry

1. Functional Overview:
Any test of electronic products will have requirements for test accuracy and processing speed. In the test of automobile generators, since the start-up of the generator is a short process, and in this short time, there will be large changes inside the generator. In this case, engineers will certainly pay attention to the sampling and data recording rate of the test instrument. DC electronic loads all use CPU control technology. The internal sampling rate of the instrument is relatively high, and the data update rate is also very fast. The voltage/current measurement rate can be as high as 50KHZ, and its resolution can be as high as 0.1mV/0.01mA. In this way, in the test of the generator, it can fully ensure the accuracy of the test. At the same time, the data during the test, such as voltage, current, power, etc., will be displayed in real time on the instrument panel, which is convenient for real-time observation and recording, and timely detection of abnormalities. The digital operation interface is also convenient for setting test data.

2. Optional power:
When testing automobile generators, different tests will have different requirements for power. If different series of products are used for each different power test, the differences in function and operation will cause considerable inconvenience to the engineers conducting the experiment. Although the electronic load is small in size, the single-channel power ranges from 150W to 50KW, and the maximum power can reach 300KW. Therefore, it can fully cover a wide power range and meet a variety of tests. In this way, it brings great convenience to both equipment selection and experimental operation.

3. Multiple working modes:

In the test of automobile generators, there is a test of generator load performance. In this test, the electronic load is required to simulate different speeds of the generator in order to obtain perfect test results. This series of DC electronic loads has multiple working modes to choose from. For example, for the load performance test of the generator, it can work in CC mode or CV mode. Both modes can simulate different speeds of the generator, thereby helping engineers obtain perfect test results.

4. List function:
In addition to simulating the different speeds of the generator, simulating the current flowing through the generator at each different speed is also an important experimental project. Through these two important experimental data, the curve of speed and current change can be drawn, so as to find out the relationship between the two. The DC electronic load has a list function, which can directly edit the current and voltage waveforms on the panel to simulate the current state of the generator at different speeds.

In addition to editing the waveform on the panel, you can also control it through a computer, which makes the operation more flexible.

5. Simulate inductive or capacitive loads:
Usually, the load carried by the car generator is not a pure resistive load, but may be an inductive or capacitive electronic load. The electronic load also has a CZ mode, which can meet the needs of simulating inductive or capacitive loads.

6. Multiple interfaces support fast communication:
When the car generator starts, it will instantly generate a large current. When operating the electronic load with a computer, if the communication is slow, it is difficult to capture the data of this instantaneous large current. The DC electronic load has many standard communication interfaces on its back. These standard communication interfaces include RS232, USB, GPIB and Ether Net, which can support multiple communication functions. The fastest communication time can reach 5ms, and can collect the state of the large current at the moment of generator startup and more data during the working process.

7. More application advantages:

The DC electronic load has OCP/OVP/OPP/OTP and reverse polarity protection functions to prevent damage to the tested equipment during the test. It is also convenient for secondary development. The computer can depict the voltage and current status during the test in the form of a curve, which is convenient for later data analysis.